General Science - Physics MCQs


Q.  What is the speed of electromagnetic waves in vacuum?

a. 1000 m/s
b. 3 x 10⁸m/s
c. 300000 m/s
d. Different for different waves


ANSWER: See Answer
 
n vacuum, all electromagnetic waves have the same speed whose value is 299, 792, 458 m/s or nearly equal to 3 x 10⁸ m/s.
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